• Dephasing of a qubit due to quantum and classical noise

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/079/03/0357-0376

• # Keywords

Qubit; telegraph noise; Liouville operators.

• # Abstract

The qubit (or a system of two quantum dots) has become a standard paradigm for studying quantum information processes. Our focus is decoherence due to interaction of the qubit with its environment, leading to noise. We consider quantum noise generated by a dissipative quantum bath. A detailed comparative study with the results for a classical noise source such as generated by a telegraph process, enebles us to set limits on the pplicability of this process $\nu is à \nu is$ its quantum counterpart, as well as lend handle on the parameters that can be tuned for analysing decoherence. Both Ohmic and non-Ohmic dissipations are treated and appropriate limits are analysed for facilitating comparison with the telegraph process.

• # Author Affiliations

1. Indian Institute of Science Education and Research-Kolkata, Mohanpur 741 252, India
2. Institute for Theoretical Physics, Friedrich Hund Platz 1, University of Goettingen, Germany
3. Visva-Bharati, Santiniketan 731 235, India

• # Pramana – Journal of Physics

Volume 96, 2022
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019